Ichiban Chikaku de Koi o Suru

Summary

I'm now at an age where it's normal to want to do it. It's just that I'm still a virgin and jealous of Itsuki, my brother. He's tall, handsome, and popular. However, Itsuki is nothing but a pervert who loves me to the point of stealing my underwear to sniff them! But when one day I joked about him being a good-for-nothing, not even capable of surprising me in my sleep, he stared at me with grave eyes It sucks, he's serious!